[deliverable/linux.git] / net / mac802154 / iface.c

/*
 * Copyright 2007-2012 Siemens AG
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Written by:
 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 * Sergey Lapin <slapin@ossfans.org>
 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
 */

#include <linux/netdevice.h>
#include <linux/module.h>
#include <linux/if_arp.h>
#include <linux/ieee802154.h>

#include <net/nl802154.h>
#include <net/mac802154.h>
#include <net/ieee802154_netdev.h>
#include <net/cfg802154.h>

#include "ieee802154_i.h"
#include "driver-ops.h"

static int mac802154_wpan_update_llsec(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	int rc = 0;

	if (ops->llsec) {
		struct ieee802154_llsec_params params;
		int changed = 0;

		params.pan_id = wpan_dev->pan_id;
		changed |= IEEE802154_LLSEC_PARAM_PAN_ID;

		params.hwaddr = wpan_dev->extended_addr;
		changed |= IEEE802154_LLSEC_PARAM_HWADDR;

		rc = ops->llsec->set_params(dev, &params, changed);
	}

	return rc;
}

static int
mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct sockaddr_ieee802154 *sa =
		(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	int err = -ENOIOCTLCMD;

	ASSERT_RTNL();

	spin_lock_bh(&sdata->mib_lock);

	switch (cmd) {
	case SIOCGIFADDR:
	{
		u16 pan_id, short_addr;

		pan_id = le16_to_cpu(wpan_dev->pan_id);
		short_addr = le16_to_cpu(wpan_dev->short_addr);
		if (pan_id == IEEE802154_PANID_BROADCAST ||
		    short_addr == IEEE802154_ADDR_BROADCAST) {
			err = -EADDRNOTAVAIL;
			break;
		}

		sa->family = AF_IEEE802154;
		sa->addr.addr_type = IEEE802154_ADDR_SHORT;
		sa->addr.pan_id = pan_id;
		sa->addr.short_addr = short_addr;

		err = 0;
		break;
	}
	case SIOCSIFADDR:
		if (netif_running(dev)) {
			spin_unlock_bh(&sdata->mib_lock);
			return -EBUSY;
		}

		dev_warn(&dev->dev,
			 "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
		if (sa->family != AF_IEEE802154 ||
		    sa->addr.addr_type != IEEE802154_ADDR_SHORT ||
		    sa->addr.pan_id == IEEE802154_PANID_BROADCAST ||
		    sa->addr.short_addr == IEEE802154_ADDR_BROADCAST ||
		    sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
			err = -EINVAL;
			break;
		}

		wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
		wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);

		err = mac802154_wpan_update_llsec(dev);
		break;
	}

	spin_unlock_bh(&sdata->mib_lock);
	return err;
}

static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct sockaddr *addr = p;
	__le64 extended_addr;

	if (netif_running(dev))
		return -EBUSY;

	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
	if (!ieee802154_is_valid_extended_addr(extended_addr))
		return -EINVAL;

	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	sdata->wpan_dev.extended_addr = extended_addr;

	return mac802154_wpan_update_llsec(dev);
}

static int mac802154_slave_open(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_local *local = sdata->local;
	int res = 0;

	ASSERT_RTNL();

	set_bit(SDATA_STATE_RUNNING, &sdata->state);

	if (!local->open_count) {
		res = drv_start(local);
		WARN_ON(res);
		if (res)
			goto err;
	}

	local->open_count++;
	netif_start_queue(dev);
	return 0;
err:
	/* might already be clear but that doesn't matter */
	clear_bit(SDATA_STATE_RUNNING, &sdata->state);

	return res;
}

static int
ieee802154_check_mac_settings(struct ieee802154_local *local,
			      struct wpan_dev *wpan_dev,
			      struct wpan_dev *nwpan_dev)
{
	ASSERT_RTNL();

	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
		if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
			return -EBUSY;
	}

	if (local->hw.flags & IEEE802154_HW_AFILT) {
		if (wpan_dev->pan_id != nwpan_dev->pan_id)
			return -EBUSY;

		if (wpan_dev->short_addr != nwpan_dev->short_addr)
			return -EBUSY;

		if (wpan_dev->extended_addr != nwpan_dev->extended_addr)
			return -EBUSY;
	}

	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
		if (wpan_dev->min_be != nwpan_dev->min_be)
			return -EBUSY;

		if (wpan_dev->max_be != nwpan_dev->max_be)
			return -EBUSY;

		if (wpan_dev->csma_retries != nwpan_dev->csma_retries)
			return -EBUSY;
	}

	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
		if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
			return -EBUSY;
	}

	if (local->hw.flags & IEEE802154_HW_LBT) {
		if (wpan_dev->lbt != nwpan_dev->lbt)
			return -EBUSY;
	}

	return 0;
}

static int
ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
				  enum nl802154_iftype iftype)
{
	struct ieee802154_local *local = sdata->local;
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct ieee802154_sub_if_data *nsdata;

	/* we hold the RTNL here so can safely walk the list */
	list_for_each_entry(nsdata, &local->interfaces, list) {
		if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
			int ret;

			/* TODO currently we don't support multiple node types
			 * we need to run skb_clone at rx path. Check if there
			 * exist really an use case if we need to support
			 * multiple node types at the same time.
			 */
			if (sdata->vif.type == NL802154_IFTYPE_NODE &&
			    nsdata->vif.type == NL802154_IFTYPE_NODE)
				return -EBUSY;

			/* check all phy mac sublayer settings are the same.
			 * We have only one phy, different values makes trouble.
			 */
			ret = ieee802154_check_mac_settings(local, wpan_dev,
							    &nsdata->wpan_dev);
			if (ret < 0)
				return ret;
		}
	}

	return 0;
}

static int mac802154_wpan_open(struct net_device *dev)
{
	int rc;
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_local *local = sdata->local;
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct wpan_phy *phy = sdata->local->phy;

	rc = ieee802154_check_concurrent_iface(sdata, sdata->vif.type);
	if (rc < 0)
		return rc;

	rc = mac802154_slave_open(dev);
	if (rc < 0)
		return rc;

	mutex_lock(&phy->pib_lock);

	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
		rc = drv_set_promiscuous_mode(local,
					      wpan_dev->promiscuous_mode);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_AFILT) {
		rc = drv_set_pan_id(local, wpan_dev->pan_id);
		if (rc < 0)
			goto out;

		rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
		if (rc < 0)
			goto out;

		rc = drv_set_short_addr(local, wpan_dev->short_addr);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_LBT) {
		rc = drv_set_lbt_mode(local, wpan_dev->lbt);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
		rc = drv_set_csma_params(local, wpan_dev->min_be,
					 wpan_dev->max_be,
					 wpan_dev->csma_retries);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
		rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
		if (rc < 0)
			goto out;
	}

	mutex_unlock(&phy->pib_lock);
	return 0;

out:
	mutex_unlock(&phy->pib_lock);
	return rc;
}

static int mac802154_slave_close(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_local *local = sdata->local;

	ASSERT_RTNL();

	hrtimer_cancel(&local->ifs_timer);

	netif_stop_queue(dev);
	local->open_count--;

	clear_bit(SDATA_STATE_RUNNING, &sdata->state);

	if (!local->open_count)
		drv_stop(local);

	return 0;
}

static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
					 struct ieee802154_hdr *hdr,
					 const struct ieee802154_mac_cb *cb)
{
	struct ieee802154_llsec_params params;
	u8 level;

	mac802154_llsec_get_params(&sdata->sec, &params);

	if (!params.enabled && cb->secen_override && cb->secen)
		return -EINVAL;
	if (!params.enabled ||
	    (cb->secen_override && !cb->secen) ||
	    !params.out_level)
		return 0;
	if (cb->seclevel_override && !cb->seclevel)
		return -EINVAL;

	level = cb->seclevel_override ? cb->seclevel : params.out_level;

	hdr->fc.security_enabled = 1;
	hdr->sec.level = level;
	hdr->sec.key_id_mode = params.out_key.mode;
	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
		hdr->sec.short_src = params.out_key.short_source;
	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
		hdr->sec.extended_src = params.out_key.extended_source;
	hdr->sec.key_id = params.out_key.id;

	return 0;
}

static int mac802154_header_create(struct sk_buff *skb,
				   struct net_device *dev,
				   unsigned short type,
				   const void *daddr,
				   const void *saddr,
				   unsigned len)
{
	struct ieee802154_hdr hdr;
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct ieee802154_mac_cb *cb = mac_cb(skb);
	int hlen;

	if (!daddr)
		return -EINVAL;

	memset(&hdr.fc, 0, sizeof(hdr.fc));
	hdr.fc.type = cb->type;
	hdr.fc.security_enabled = cb->secen;
	hdr.fc.ack_request = cb->ackreq;
	hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);

	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
		return -EINVAL;

	if (!saddr) {
		spin_lock_bh(&sdata->mib_lock);

		if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
		    wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
		    wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
			hdr.source.mode = IEEE802154_ADDR_LONG;
			hdr.source.extended_addr = wpan_dev->extended_addr;
		} else {
			hdr.source.mode = IEEE802154_ADDR_SHORT;
			hdr.source.short_addr = wpan_dev->short_addr;
		}

		hdr.source.pan_id = wpan_dev->pan_id;

		spin_unlock_bh(&sdata->mib_lock);
	} else {
		hdr.source = *(const struct ieee802154_addr *)saddr;
	}

	hdr.dest = *(const struct ieee802154_addr *)daddr;

	hlen = ieee802154_hdr_push(skb, &hdr);
	if (hlen < 0)
		return -EINVAL;

	skb_reset_mac_header(skb);
	skb->mac_len = hlen;

	if (len > ieee802154_max_payload(&hdr))
		return -EMSGSIZE;

	return hlen;
}

static int
mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
{
	struct ieee802154_hdr hdr;
	struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr;

	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
		pr_debug("malformed packet\n");
		return 0;
	}

	*addr = hdr.source;
	return sizeof(*addr);
}

static struct header_ops mac802154_header_ops = {
	.create		= mac802154_header_create,
	.parse		= mac802154_header_parse,
};

static const struct net_device_ops mac802154_wpan_ops = {
	.ndo_open		= mac802154_wpan_open,
	.ndo_stop		= mac802154_slave_close,
	.ndo_start_xmit		= ieee802154_subif_start_xmit,
	.ndo_do_ioctl		= mac802154_wpan_ioctl,
	.ndo_set_mac_address	= mac802154_wpan_mac_addr,
};

static const struct net_device_ops mac802154_monitor_ops = {
	.ndo_open		= mac802154_wpan_open,
	.ndo_stop		= mac802154_slave_close,
	.ndo_start_xmit		= ieee802154_monitor_start_xmit,
};

static void mac802154_wpan_free(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);

	mac802154_llsec_destroy(&sdata->sec);

	free_netdev(dev);
}

static void ieee802154_if_setup(struct net_device *dev)
{
	dev->addr_len		= IEEE802154_EXTENDED_ADDR_LEN;
	memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);

	dev->hard_header_len	= MAC802154_FRAME_HARD_HEADER_LEN;
	dev->needed_tailroom	= 2 + 16; /* FCS + MIC */
	dev->mtu		= IEEE802154_MTU;
	dev->tx_queue_len	= 300;
	dev->flags		= IFF_NOARP | IFF_BROADCAST;
}

static int
ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
		       enum nl802154_iftype type)
{
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;

	/* set some type-dependent values */
	sdata->vif.type = type;
	sdata->wpan_dev.iftype = type;

	get_random_bytes(&wpan_dev->bsn, 1);
	get_random_bytes(&wpan_dev->dsn, 1);

	/* defaults per 802.15.4-2011 */
	wpan_dev->min_be = 3;
	wpan_dev->max_be = 5;
	wpan_dev->csma_retries = 4;
	/* for compatibility, actual default is 3 */
	wpan_dev->frame_retries = -1;

	wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
	wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);

	switch (type) {
	case NL802154_IFTYPE_NODE:
		ieee802154_be64_to_le64(&wpan_dev->extended_addr,
					sdata->dev->dev_addr);

		sdata->dev->header_ops = &mac802154_header_ops;
		sdata->dev->destructor = mac802154_wpan_free;
		sdata->dev->netdev_ops = &mac802154_wpan_ops;
		sdata->dev->ml_priv = &mac802154_mlme_wpan;
		wpan_dev->promiscuous_mode = false;

		spin_lock_init(&sdata->mib_lock);
		mutex_init(&sdata->sec_mtx);

		mac802154_llsec_init(&sdata->sec);
		break;
	case NL802154_IFTYPE_MONITOR:
		sdata->dev->destructor = free_netdev;
		sdata->dev->netdev_ops = &mac802154_monitor_ops;
		wpan_dev->promiscuous_mode = true;
		break;
	default:
		BUG();
	}

	return 0;
}

struct net_device *
ieee802154_if_add(struct ieee802154_local *local, const char *name,
		  enum nl802154_iftype type, __le64 extended_addr)
{
	struct net_device *ndev = NULL;
	struct ieee802154_sub_if_data *sdata = NULL;
	int ret = -ENOMEM;

	ASSERT_RTNL();

	ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
			    NET_NAME_UNKNOWN, ieee802154_if_setup);
	if (!ndev)
		return ERR_PTR(-ENOMEM);

	ndev->needed_headroom = local->hw.extra_tx_headroom;

	ret = dev_alloc_name(ndev, ndev->name);
	if (ret < 0)
		goto err;

	ieee802154_le64_to_be64(ndev->perm_addr,
				&local->hw.phy->perm_extended_addr);
	switch (type) {
	case NL802154_IFTYPE_NODE:
		ndev->type = ARPHRD_IEEE802154;
		if (ieee802154_is_valid_extended_addr(extended_addr))
			ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
		else
			memcpy(ndev->dev_addr, ndev->perm_addr,
			       IEEE802154_EXTENDED_ADDR_LEN);
		break;
	case NL802154_IFTYPE_MONITOR:
		ndev->type = ARPHRD_IEEE802154_MONITOR;
		break;
	default:
		ret = -EINVAL;
		goto err;
	}

	/* TODO check this */
	SET_NETDEV_DEV(ndev, &local->phy->dev);
	sdata = netdev_priv(ndev);
	ndev->ieee802154_ptr = &sdata->wpan_dev;
	memcpy(sdata->name, ndev->name, IFNAMSIZ);
	sdata->dev = ndev;
	sdata->wpan_dev.wpan_phy = local->hw.phy;
	sdata->local = local;

	/* setup type-dependent data */
	ret = ieee802154_setup_sdata(sdata, type);
	if (ret)
		goto err;

	ret = register_netdevice(ndev);
	if (ret < 0)
		goto err;

	mutex_lock(&local->iflist_mtx);
	list_add_tail_rcu(&sdata->list, &local->interfaces);
	mutex_unlock(&local->iflist_mtx);

	return ndev;

err:
	free_netdev(ndev);
	return ERR_PTR(ret);
}

void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
{
	ASSERT_RTNL();

	mutex_lock(&sdata->local->iflist_mtx);
	list_del_rcu(&sdata->list);
	mutex_unlock(&sdata->local->iflist_mtx);

	synchronize_rcu();
	unregister_netdevice(sdata->dev);
}

void ieee802154_remove_interfaces(struct ieee802154_local *local)
{
	struct ieee802154_sub_if_data *sdata, *tmp;

	mutex_lock(&local->iflist_mtx);
	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
		list_del(&sdata->list);

		unregister_netdevice(sdata->dev);
	}
	mutex_unlock(&local->iflist_mtx);
}

static int netdev_notify(struct notifier_block *nb,
			 unsigned long state, void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	struct ieee802154_sub_if_data *sdata;

	if (state != NETDEV_CHANGENAME)
		return NOTIFY_DONE;

	if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
		return NOTIFY_DONE;

	if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
		return NOTIFY_DONE;

	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	memcpy(sdata->name, dev->name, IFNAMSIZ);

	return NOTIFY_OK;
}

static struct notifier_block mac802154_netdev_notifier = {
	.notifier_call = netdev_notify,
};

int ieee802154_iface_init(void)
{
	return register_netdevice_notifier(&mac802154_netdev_notifier);
}

void ieee802154_iface_exit(void)
{
	unregister_netdevice_notifier(&mac802154_netdev_notifier);
}
Commit	Line	Data
32bad7e3	1	/*
	2	* Copyright 2007-2012 Siemens AG
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2
	6	* as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
32bad7e3	13	* Written by:
	14	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
	15	* Sergey Lapin <slapin@ossfans.org>
	16	* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
	17	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	18	*/
	19
	20	#include <linux/netdevice.h>
	21	#include <linux/module.h>
	22	#include <linux/if_arp.h>
4ca24aca	23	#include <linux/ieee802154.h>
32bad7e3	24
944742a3	25	#include <net/nl802154.h>
32bad7e3	26	#include <net/mac802154.h>
32bad7e3	27	#include <net/ieee802154_netdev.h>
5ad60d36	28	#include <net/cfg802154.h>
32bad7e3	29
0f1556bc	30	#include "ieee802154_i.h"
59cb300f	31	#include "driver-ops.h"
32bad7e3	32
9b0bb4a8 PB	33	static int mac802154_wpan_update_llsec(struct net_device *dev)
9b0bb4a8 PB	34	{
59d19cd7	35	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
9b0bb4a8	36	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
863e88f2	37	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
9b0bb4a8 PB	38	int rc = 0;
	39
	40	if (ops->llsec) {
	41	struct ieee802154_llsec_params params;
	42	int changed = 0;
	43
863e88f2	44	params.pan_id = wpan_dev->pan_id;
9b0bb4a8 PB	45	changed \|= IEEE802154_LLSEC_PARAM_PAN_ID;
9b0bb4a8 PB	46
863e88f2	47	params.hwaddr = wpan_dev->extended_addr;
9b0bb4a8 PB	48	changed \|= IEEE802154_LLSEC_PARAM_HWADDR;
	49
	50	rc = ops->llsec->set_params(dev, &params, changed);
	51	}
	52
	53	return rc;
	54	}
	55
32bad7e3	56	static int
	57	mac802154_wpan_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	58	{
59d19cd7	59	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
863e88f2	60	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
32bad7e3	61	struct sockaddr_ieee802154 *sa =
	62	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	63	int err = -ENOIOCTLCMD;
	64
f7cb96f1 AA	65	ASSERT_RTNL();
f7cb96f1 AA	66
036562f9	67	spin_lock_bh(&sdata->mib_lock);
32bad7e3	68
	69	switch (cmd) {
	70	case SIOCGIFADDR:
b70ab2e8 PB	71	{
	72	u16 pan_id, short_addr;
	73
863e88f2 AA	74	pan_id = le16_to_cpu(wpan_dev->pan_id);
863e88f2 AA	75	short_addr = le16_to_cpu(wpan_dev->short_addr);
b70ab2e8 PB	76	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
b70ab2e8 PB	77	short_addr == IEEE802154_ADDR_BROADCAST) {
32bad7e3	78	err = -EADDRNOTAVAIL;
	79	break;
	80	}
	81
	82	sa->family = AF_IEEE802154;
	83	sa->addr.addr_type = IEEE802154_ADDR_SHORT;
b70ab2e8 PB	84	sa->addr.pan_id = pan_id;
b70ab2e8 PB	85	sa->addr.short_addr = short_addr;
32bad7e3	86
	87	err = 0;
	88	break;
b70ab2e8	89	}
32bad7e3	90	case SIOCSIFADDR:
f7cb96f1 AA	91	if (netif_running(dev)) {
	92	spin_unlock_bh(&sdata->mib_lock);
	93	return -EBUSY;
	94	}
	95
32bad7e3	96	dev_warn(&dev->dev,
9b13494c	97	"Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
32bad7e3	98	if (sa->family != AF_IEEE802154 \|\|
	99	sa->addr.addr_type != IEEE802154_ADDR_SHORT \|\|
	100	sa->addr.pan_id == IEEE802154_PANID_BROADCAST \|\|
	101	sa->addr.short_addr == IEEE802154_ADDR_BROADCAST \|\|
	102	sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
	103	err = -EINVAL;
	104	break;
	105	}
	106
863e88f2 AA	107	wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
863e88f2 AA	108	wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
32bad7e3	109
9b0bb4a8	110	err = mac802154_wpan_update_llsec(dev);
32bad7e3	111	break;
	112	}
	113
036562f9	114	spin_unlock_bh(&sdata->mib_lock);
32bad7e3	115	return err;
	116	}
	117
	118	static int mac802154_wpan_mac_addr(struct net_device dev, void p)
	119	{
776e59de	120	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
32bad7e3	121	struct sockaddr *addr = p;
ea7053c1	122	__le64 extended_addr;
32bad7e3	123
	124	if (netif_running(dev))
	125	return -EBUSY;
	126
705cbbbe	127	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
ea7053c1 AA	128	if (!ieee802154_is_valid_extended_addr(extended_addr))
	129	return -EINVAL;
	130
32bad7e3	131	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
863e88f2	132	sdata->wpan_dev.extended_addr = extended_addr;
776e59de	133
9b0bb4a8	134	return mac802154_wpan_update_llsec(dev);
32bad7e3	135	}
32bad7e3	136
19ec690a AA	137	static int mac802154_slave_open(struct net_device *dev)
	138	{
	139	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
19ec690a AA	140	struct ieee802154_local *local = sdata->local;
	141	int res = 0;
	142
	143	ASSERT_RTNL();
	144
0ea3da64	145	set_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	146
74457641	147	if (!local->open_count) {
59cb300f	148	res = drv_start(local);
19ec690a AA	149	WARN_ON(res);
	150	if (res)
	151	goto err;
	152	}
	153
74457641	154	local->open_count++;
19ec690a AA	155	netif_start_queue(dev);
	156	return 0;
	157	err:
0ea3da64 AA	158	/* might already be clear but that doesn't matter */
0ea3da64 AA	159	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a AA	160
	161	return res;
	162	}
	163
bd37a78d AA	164	static int
	165	ieee802154_check_mac_settings(struct ieee802154_local *local,
	166	struct wpan_dev *wpan_dev,
	167	struct wpan_dev *nwpan_dev)
	168	{
	169	ASSERT_RTNL();
	170
	171	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
	172	if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
	173	return -EBUSY;
	174	}
	175
	176	if (local->hw.flags & IEEE802154_HW_AFILT) {
	177	if (wpan_dev->pan_id != nwpan_dev->pan_id)
	178	return -EBUSY;
	179
	180	if (wpan_dev->short_addr != nwpan_dev->short_addr)
	181	return -EBUSY;
	182
	183	if (wpan_dev->extended_addr != nwpan_dev->extended_addr)
	184	return -EBUSY;
	185	}
	186
	187	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
	188	if (wpan_dev->min_be != nwpan_dev->min_be)
	189	return -EBUSY;
	190
	191	if (wpan_dev->max_be != nwpan_dev->max_be)
	192	return -EBUSY;
	193
	194	if (wpan_dev->csma_retries != nwpan_dev->csma_retries)
	195	return -EBUSY;
	196	}
	197
	198	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
	199	if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
	200	return -EBUSY;
	201	}
	202
	203	if (local->hw.flags & IEEE802154_HW_LBT) {
	204	if (wpan_dev->lbt != nwpan_dev->lbt)
	205	return -EBUSY;
	206	}
	207
	208	return 0;
	209	}
	210
	211	static int
	212	ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
	213	enum nl802154_iftype iftype)
	214	{
	215	struct ieee802154_local *local = sdata->local;
	216	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	217	struct ieee802154_sub_if_data *nsdata;
	218
	219	/* we hold the RTNL here so can safely walk the list */
	220	list_for_each_entry(nsdata, &local->interfaces, list) {
	221	if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
	222	int ret;
	223
cd1c5665 AA	224	/* TODO currently we don't support multiple node types
	225	* we need to run skb_clone at rx path. Check if there
	226	* exist really an use case if we need to support
	227	* multiple node types at the same time.
	228	*/
	229	if (sdata->vif.type == NL802154_IFTYPE_NODE &&
	230	nsdata->vif.type == NL802154_IFTYPE_NODE)
	231	return -EBUSY;
	232
bd37a78d AA	233	/* check all phy mac sublayer settings are the same.
	234	* We have only one phy, different values makes trouble.
	235	*/
	236	ret = ieee802154_check_mac_settings(local, wpan_dev,
	237	&nsdata->wpan_dev);
	238	if (ret < 0)
	239	return ret;
	240	}
	241	}
	242
	243	return 0;
	244	}
	245
6ef0023a	246	static int mac802154_wpan_open(struct net_device *dev)
e462ded6 PB	247	{
e462ded6 PB	248	int rc;
59d19cd7	249	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
59cb300f	250	struct ieee802154_local *local = sdata->local;
863e88f2	251	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
04e850fe	252	struct wpan_phy *phy = sdata->local->phy;
e462ded6	253
bd37a78d AA	254	rc = ieee802154_check_concurrent_iface(sdata, sdata->vif.type);
	255	if (rc < 0)
	256	return rc;
	257
e462ded6 PB	258	rc = mac802154_slave_open(dev);
	259	if (rc < 0)
	260	return rc;
	261
	262	mutex_lock(&phy->pib_lock);
	263
38130c31	264	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
863e88f2 AA	265	rc = drv_set_promiscuous_mode(local,
863e88f2 AA	266	wpan_dev->promiscuous_mode);
38130c31 AA	267	if (rc < 0)
	268	goto out;
	269	}
	270
776e59de	271	if (local->hw.flags & IEEE802154_HW_AFILT) {
863e88f2	272	rc = drv_set_pan_id(local, wpan_dev->pan_id);
50c79075 AA	273	if (rc < 0)
	274	goto out;
	275
863e88f2	276	rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
776e59de AA	277	if (rc < 0)
776e59de AA	278	goto out;
78b4bad1	279
863e88f2	280	rc = drv_set_short_addr(local, wpan_dev->short_addr);
78b4bad1 AA	281	if (rc < 0)
78b4bad1 AA	282	goto out;
776e59de AA	283	}
776e59de AA	284
a543c598	285	if (local->hw.flags & IEEE802154_HW_LBT) {
5fb3f026	286	rc = drv_set_lbt_mode(local, wpan_dev->lbt);
e462ded6 PB	287	if (rc < 0)
	288	goto out;
	289	}
	290
a543c598	291	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
5fb3f026 AA	292	rc = drv_set_csma_params(local, wpan_dev->min_be,
	293	wpan_dev->max_be,
	294	wpan_dev->csma_retries);
e462ded6 PB	295	if (rc < 0)
	296	goto out;
	297	}
	298
a543c598	299	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
5fb3f026	300	rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
e462ded6 PB	301	if (rc < 0)
	302	goto out;
	303	}
	304
	305	mutex_unlock(&phy->pib_lock);
	306	return 0;
	307
	308	out:
	309	mutex_unlock(&phy->pib_lock);
	310	return rc;
	311	}
	312
19ec690a AA	313	static int mac802154_slave_close(struct net_device *dev)
	314	{
	315	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	316	struct ieee802154_local *local = sdata->local;
	317
	318	ASSERT_RTNL();
	319
61f2dcba AA	320	hrtimer_cancel(&local->ifs_timer);
61f2dcba AA	321
19ec690a	322	netif_stop_queue(dev);
74457641	323	local->open_count--;
19ec690a	324
0ea3da64	325	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	326
74457641	327	if (!local->open_count)
59cb300f	328	drv_stop(local);
19ec690a AA	329
	330	return 0;
	331	}
	332
036562f9	333	static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
f30be4d5 PB	334	struct ieee802154_hdr *hdr,
	335	const struct ieee802154_mac_cb *cb)
	336	{
	337	struct ieee802154_llsec_params params;
	338	u8 level;
	339
036562f9	340	mac802154_llsec_get_params(&sdata->sec, &params);
f30be4d5 PB	341
	342	if (!params.enabled && cb->secen_override && cb->secen)
	343	return -EINVAL;
	344	if (!params.enabled \|\|
	345	(cb->secen_override && !cb->secen) \|\|
	346	!params.out_level)
	347	return 0;
	348	if (cb->seclevel_override && !cb->seclevel)
	349	return -EINVAL;
	350
	351	level = cb->seclevel_override ? cb->seclevel : params.out_level;
	352
	353	hdr->fc.security_enabled = 1;
	354	hdr->sec.level = level;
	355	hdr->sec.key_id_mode = params.out_key.mode;
	356	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
	357	hdr->sec.short_src = params.out_key.short_source;
	358	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
	359	hdr->sec.extended_src = params.out_key.extended_source;
	360	hdr->sec.key_id = params.out_key.id;
	361
	362	return 0;
	363	}
	364
32bad7e3	365	static int mac802154_header_create(struct sk_buff *skb,
	366	struct net_device *dev,
	367	unsigned short type,
e6278d92 PB	368	const void *daddr,
e6278d92 PB	369	const void *saddr,
32bad7e3	370	unsigned len)
32bad7e3	371	{
e6278d92	372	struct ieee802154_hdr hdr;
59d19cd7	373	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
863e88f2	374	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
32edc40a	375	struct ieee802154_mac_cb *cb = mac_cb(skb);
e6278d92	376	int hlen;
32bad7e3	377
	378	if (!daddr)
	379	return -EINVAL;
	380
e6278d92	381	memset(&hdr.fc, 0, sizeof(hdr.fc));
32edc40a PB	382	hdr.fc.type = cb->type;
	383	hdr.fc.security_enabled = cb->secen;
	384	hdr.fc.ack_request = cb->ackreq;
	385	hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
32bad7e3	386
036562f9	387	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
f30be4d5 PB	388	return -EINVAL;
f30be4d5 PB	389
32bad7e3	390	if (!saddr) {
036562f9	391	spin_lock_bh(&sdata->mib_lock);
32bad7e3	392
863e88f2 AA	393	if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	394	wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	395	wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
e6278d92	396	hdr.source.mode = IEEE802154_ADDR_LONG;
863e88f2	397	hdr.source.extended_addr = wpan_dev->extended_addr;
32bad7e3	398	} else {
e6278d92	399	hdr.source.mode = IEEE802154_ADDR_SHORT;
863e88f2	400	hdr.source.short_addr = wpan_dev->short_addr;
32bad7e3	401	}
32bad7e3	402
863e88f2	403	hdr.source.pan_id = wpan_dev->pan_id;
32bad7e3	404
036562f9	405	spin_unlock_bh(&sdata->mib_lock);
e6278d92 PB	406	} else {
e6278d92 PB	407	hdr.source = (const struct ieee802154_addr )saddr;
32bad7e3	408	}
32bad7e3	409
e6278d92	410	hdr.dest = (const struct ieee802154_addr )daddr;
32bad7e3	411
e6278d92 PB	412	hlen = ieee802154_hdr_push(skb, &hdr);
	413	if (hlen < 0)
	414	return -EINVAL;
32bad7e3	415
3e69162e	416	skb_reset_mac_header(skb);
e6278d92	417	skb->mac_len = hlen;
32bad7e3	418
8c84296f	419	if (len > ieee802154_max_payload(&hdr))
d1d7358e PB	420	return -EMSGSIZE;
d1d7358e PB	421
e6278d92	422	return hlen;
32bad7e3	423	}
	424
	425	static int
	426	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	427	{
e6278d92 PB	428	struct ieee802154_hdr hdr;
e6278d92 PB	429	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
32bad7e3	430
e6278d92 PB	431	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	432	pr_debug("malformed packet\n");
	433	return 0;
32bad7e3	434	}
32bad7e3	435
e6278d92 PB	436	*addr = hdr.source;
e6278d92 PB	437	return sizeof(*addr);
32bad7e3	438	}
32bad7e3	439
32bad7e3	440	static struct header_ops mac802154_header_ops = {
	441	.create = mac802154_header_create,
	442	.parse = mac802154_header_parse,
	443	};
	444
	445	static const struct net_device_ops mac802154_wpan_ops = {
e462ded6	446	.ndo_open = mac802154_wpan_open,
32bad7e3	447	.ndo_stop = mac802154_slave_close,
e5e584fc	448	.ndo_start_xmit = ieee802154_subif_start_xmit,
32bad7e3	449	.ndo_do_ioctl = mac802154_wpan_ioctl,
	450	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	451	};
	452
b9ff77e5	453	static const struct net_device_ops mac802154_monitor_ops = {
38130c31	454	.ndo_open = mac802154_wpan_open,
b9ff77e5 AA	455	.ndo_stop = mac802154_slave_close,
	456	.ndo_start_xmit = ieee802154_monitor_start_xmit,
	457	};
	458
f30be4d5 PB	459	static void mac802154_wpan_free(struct net_device *dev)
f30be4d5 PB	460	{
59d19cd7	461	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
f30be4d5	462
036562f9	463	mac802154_llsec_destroy(&sdata->sec);
f30be4d5 PB	464
	465	free_netdev(dev);
	466	}
	467
d5ae67ba	468	static void ieee802154_if_setup(struct net_device *dev)
32bad7e3	469	{
e57a8946 AA	470	dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
e57a8946 AA	471	memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
32bad7e3	472
32bad7e3	473	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
f30be4d5	474	dev->needed_tailroom = 2 + 16; /* FCS + MIC */
32bad7e3	475	dev->mtu = IEEE802154_MTU;
e937f583	476	dev->tx_queue_len = 300;
32bad7e3	477	dev->flags = IFF_NOARP \| IFF_BROADCAST;
d5ae67ba	478	}
32bad7e3	479
d5ae67ba	480	static int
944742a3 AA	481	ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
944742a3 AA	482	enum nl802154_iftype type)
d5ae67ba	483	{
863e88f2 AA	484	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
863e88f2 AA	485
d5ae67ba	486	/* set some type-dependent values */
7c118c1a	487	sdata->vif.type = type;
190ac1ca	488	sdata->wpan_dev.iftype = type;
32bad7e3	489
863e88f2 AA	490	get_random_bytes(&wpan_dev->bsn, 1);
863e88f2 AA	491	get_random_bytes(&wpan_dev->dsn, 1);
32bad7e3	492
e462ded6	493	/* defaults per 802.15.4-2011 */
5fb3f026 AA	494	wpan_dev->min_be = 3;
	495	wpan_dev->max_be = 5;
	496	wpan_dev->csma_retries = 4;
036562f9	497	/* for compatibility, actual default is 3 */
5fb3f026	498	wpan_dev->frame_retries = -1;
e462ded6	499
863e88f2 AA	500	wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
863e88f2 AA	501	wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
f30be4d5	502
d5ae67ba	503	switch (type) {
944742a3	504	case NL802154_IFTYPE_NODE:
b03c9ccc AA	505	ieee802154_be64_to_le64(&wpan_dev->extended_addr,
	506	sdata->dev->dev_addr);
	507
d5ae67ba AA	508	sdata->dev->header_ops = &mac802154_header_ops;
	509	sdata->dev->destructor = mac802154_wpan_free;
	510	sdata->dev->netdev_ops = &mac802154_wpan_ops;
	511	sdata->dev->ml_priv = &mac802154_mlme_wpan;
863e88f2	512	wpan_dev->promiscuous_mode = false;
986a8abf	513
d5ae67ba AA	514	spin_lock_init(&sdata->mib_lock);
d5ae67ba AA	515	mutex_init(&sdata->sec_mtx);
986a8abf	516
d5ae67ba AA	517	mac802154_llsec_init(&sdata->sec);
d5ae67ba AA	518	break;
944742a3	519	case NL802154_IFTYPE_MONITOR:
d5ae67ba AA	520	sdata->dev->destructor = free_netdev;
d5ae67ba AA	521	sdata->dev->netdev_ops = &mac802154_monitor_ops;
863e88f2	522	wpan_dev->promiscuous_mode = true;
d5ae67ba AA	523	break;
	524	default:
	525	BUG();
	526	}
986a8abf AA	527
	528	return 0;
	529	}
	530
	531	struct net_device *
	532	ieee802154_if_add(struct ieee802154_local local, const char name,
0e57547e	533	enum nl802154_iftype type, __le64 extended_addr)
986a8abf	534	{
d5ae67ba AA	535	struct net_device *ndev = NULL;
	536	struct ieee802154_sub_if_data *sdata = NULL;
	537	int ret = -ENOMEM;
	538
	539	ASSERT_RTNL();
	540
7c118c1a AA	541	ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
7c118c1a AA	542	NET_NAME_UNKNOWN, ieee802154_if_setup);
d5ae67ba AA	543	if (!ndev)
	544	return ERR_PTR(-ENOMEM);
	545
	546	ndev->needed_headroom = local->hw.extra_tx_headroom;
	547
	548	ret = dev_alloc_name(ndev, ndev->name);
	549	if (ret < 0)
	550	goto err;
986a8abf	551
0e57547e AA	552	ieee802154_le64_to_be64(ndev->perm_addr,
0e57547e AA	553	&local->hw.phy->perm_extended_addr);
986a8abf	554	switch (type) {
944742a3	555	case NL802154_IFTYPE_NODE:
d5ae67ba	556	ndev->type = ARPHRD_IEEE802154;
0e57547e AA	557	if (ieee802154_is_valid_extended_addr(extended_addr))
	558	ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
	559	else
	560	memcpy(ndev->dev_addr, ndev->perm_addr,
	561	IEEE802154_EXTENDED_ADDR_LEN);
986a8abf	562	break;
944742a3	563	case NL802154_IFTYPE_MONITOR:
d5ae67ba	564	ndev->type = ARPHRD_IEEE802154_MONITOR;
986a8abf	565	break;
d5ae67ba AA	566	default:
	567	ret = -EINVAL;
	568	goto err;
986a8abf	569	}
d5ae67ba AA	570
	571	/* TODO check this */
	572	SET_NETDEV_DEV(ndev, &local->phy->dev);
	573	sdata = netdev_priv(ndev);
	574	ndev->ieee802154_ptr = &sdata->wpan_dev;
	575	memcpy(sdata->name, ndev->name, IFNAMSIZ);
	576	sdata->dev = ndev;
	577	sdata->wpan_dev.wpan_phy = local->hw.phy;
	578	sdata->local = local;
	579
	580	/* setup type-dependent data */
	581	ret = ieee802154_setup_sdata(sdata, type);
	582	if (ret)
986a8abf AA	583	goto err;
986a8abf AA	584
473f3766 VB	585	ret = register_netdevice(ndev);
	586	if (ret < 0)
	587	goto err;
d5ae67ba AA	588
	589	mutex_lock(&local->iflist_mtx);
	590	list_add_tail_rcu(&sdata->list, &local->interfaces);
	591	mutex_unlock(&local->iflist_mtx);
986a8abf	592
d5ae67ba	593	return ndev;
986a8abf	594
986a8abf	595	err:
d5ae67ba AA	596	free_netdev(ndev);
d5ae67ba AA	597	return ERR_PTR(ret);
986a8abf AA	598	}
986a8abf AA	599
b210b187 AA	600	void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
	601	{
	602	ASSERT_RTNL();
	603
	604	mutex_lock(&sdata->local->iflist_mtx);
	605	list_del_rcu(&sdata->list);
	606	mutex_unlock(&sdata->local->iflist_mtx);
	607
	608	synchronize_rcu();
	609	unregister_netdevice(sdata->dev);
	610	}
592dfbfc AA	611
	612	void ieee802154_remove_interfaces(struct ieee802154_local *local)
	613	{
d14e1c71	614	struct ieee802154_sub_if_data sdata, tmp;
592dfbfc	615
2789e629	616	mutex_lock(&local->iflist_mtx);
d14e1c71	617	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
592dfbfc	618	list_del(&sdata->list);
592dfbfc AA	619
	620	unregister_netdevice(sdata->dev);
	621	}
2789e629	622	mutex_unlock(&local->iflist_mtx);
592dfbfc	623	}
be4fd8e5 AA	624
	625	static int netdev_notify(struct notifier_block *nb,
	626	unsigned long state, void *ptr)
	627	{
	628	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	629	struct ieee802154_sub_if_data *sdata;
	630
	631	if (state != NETDEV_CHANGENAME)
	632	return NOTIFY_DONE;
	633
	634	if (!dev->ieee802154_ptr \|\| !dev->ieee802154_ptr->wpan_phy)
	635	return NOTIFY_DONE;
	636
	637	if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
	638	return NOTIFY_DONE;
	639
	640	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	641	memcpy(sdata->name, dev->name, IFNAMSIZ);
	642
	643	return NOTIFY_OK;
	644	}
	645
	646	static struct notifier_block mac802154_netdev_notifier = {
	647	.notifier_call = netdev_notify,
	648	};
	649
	650	int ieee802154_iface_init(void)
	651	{
	652	return register_netdevice_notifier(&mac802154_netdev_notifier);
	653	}
	654
	655	void ieee802154_iface_exit(void)
	656	{
	657	unregister_netdevice_notifier(&mac802154_netdev_notifier);
	658	}